“Correlation Between Tumor Cell Differentiation and CEA Levels in Patients With Adenocarcinoma of the Rectum”. Majalah Kedokteran Bandung 52, no. 4 (December 30, 2020): 233–237. Accessed July 27, 2026. https://journal.fk.unpad.ac.id/index.php/mkb/article/view/2028.